We post a lot of hard drives on this site, but usually, it’s more of the same. External storage in a compact package, sometimes faster, sometimes cheaper. Western Digital’s My Passport Pro ($300-$430) is a truly exciting new option though, for a number of reasons. It’s a dual-drive system, with up to 4TB of storage. It’s a Thunderbolt system, too, making it one of the least expensive drives to use the technology that we’ve…
